Section 327IAC19-12-5. Design requirements for liners

   (a) The soil or foundation of a manure storage pond or manure treatment lagoon shall have a maximum specific discharge of 1/16 in ³/in ²/day (1.8x10 ^-6cm ³/cm²/sec). This requirement may be satisfied by soil testing that shows a minimum of three (3) feet of in situ soils that meet the maximum specific discharge criteria. The soil must be over-excavated a minimum of six (6) inches and recompacted to break up the existing macropore structure.

  (b) If there is not at least three (3) feet of in situ soils that meet the maximum specific discharge criteria in subsection (a), a liner must be used. Except for clay liners described in subsection (c), liners used in manure storage facilities must meet any of the following design standards:

(1) Indiana NRCS Conservation Practice Standard Code 521A: Pond Sealing or Lining, Flexible Membrane, October 2006.

(2) Indiana NRCS Conservation Practice Standard Code 521B: Pond Sealing or Lining, Soil Dispersant, October 2006.

(3) Indiana NRCS Conservation Practice Standard Code 521C: Pond Sealing or Lining, Bentonite Sealant, October 2006.

  (c) Clay liners shall be a minimum of one (1) foot thick and have a maximum specific discharge of 1/16 in³/in²/day (1.8x10^-6cm³/cm²/sec). (Water Pollution Control Division; 327 IAC 19-12-5; filed Feb 6, 2012, 2:58 p.m.: 20120307-IR-327090615FRA, eff Jul 1, 2012)